Air supply structure of rotor type compressor

Abstract

The invention relates to the technical field of compressors, and particularly discloses an air supplementing structure of a rotor type compressor, the air supplementing structure of the rotor type compressor comprises an air supplementing hole, the air supplementing hole is formed in at least one of a middle plate, an upper cylinder cover and a lower cylinder cover, and the air supplementing hole is formed in at least one of the middle plate, the upper cylinder cover and the lower cylinder cover by accurately controlling angle parameters of the air supplementing hole. According to the high-precision regulation and control mode, the air supplementing angle, the air supplementing starting angle and the air supplementing closing angle can be effectively adjusted according to the air supplementing angle and the center distance between the air supplementing hole and the middle plate or the upper cylinder cover or the lower cylinder cover or other air supplementing components, the working efficiency and the performance index of the air supplementing machine can be remarkably improved through the high-precision regulation and control mode, the requirements of actual operation working conditions can be more accurately met, and the practicability is high. Equipment abrasion and the failure rate caused by untimely or excessive air supply are reduced, energy conservation and cost optimization are achieved, and then the comprehensive performance and the operation efficiency of the whole air supply system are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to a gas supply structure for a rotary compressor. Background Technology

[0002] A rotary compressor includes a housing, as well as a motor assembly and a pump section built into the housing. The pump section typically includes an upper cylinder head, two cylinders, a lower cylinder head, and an intermediate plate. During operation, it uses the motor assembly to generate rotational driving force to work. In order to further improve the energy efficiency and performance of the compressor, it is usually necessary to introduce a gas injection structure to inject gas into the cylinders to increase enthalpy.

[0003] However, current air injection systems designed for compressors have certain limitations. Specifically, the angle of the air injection port and the center distance between the air injection port and its corresponding intermediate plate, upper cylinder head, or lower cylinder head restrict the performance of the air injection mechanism and directly affect the amount of air injected. More importantly, these limitations make it difficult to fully guarantee the stability and reliability of the air injection process, further reducing the air injection efficiency and the overall system stability.

[0004] Therefore, there is an urgent need for a gas injection structure for rotary compressors to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a gas injection structure for a rotary compressor, which can effectively improve the performance and efficiency of the gas injection system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a gas injection structure for a rotary compressor. The rotary compressor includes a pump body section, which includes a plurality of cylinders, a plurality of intermediate plates, a plurality of pistons, a crankshaft, an upper cylinder head, and a lower cylinder head. The plurality of cylinders are encapsulated between the upper cylinder head and the lower cylinder head. The intermediate plates are encapsulated between two adjacent cylinders. The plurality of pistons are arranged in a one-to-one correspondence with the plurality of cylinders, and the pistons are fitted onto the crankshaft and rolled within the cylinders. Each cylinder has a vane groove. The gas injection structure includes a gas injection hole, which is located on at least one of the intermediate plates, the upper cylinder head, and the lower cylinder head. The center distance between the gas injection hole and the intermediate plate, the upper cylinder head, or the lower cylinder head where it is located is L. The inner diameter of the piston is R. i , where L and R i satisfy:

[0008] ;

[0009] The inner diameter of the cylinder is R. dThe cylinder height is D, the piston outer diameter is R0, the crankshaft eccentricity is e, and the air intake angle is β. When the cylinder displacement is between 9cc and 19cc, and the piston's rotation angle relative to the centerline of the blade groove is 0°, L and R... d D, R i R0, e, and β satisfy:

[0010] .

[0011] As a preferred technical solution for the gas injection structure of the aforementioned rotary compressor, when the displacement of the cylinder is in the range of 19cc-27cc, and the rotation angle of the piston with respect to the center line of the blade groove is 0°, L, R d D, R i R0, e, and β satisfy:

[0012] .

[0013] As a preferred technical solution for the gas replenishment structure of the above-mentioned rotary compressor, the pump body section includes two cylinders, an intermediate plate, two pistons, a crankshaft, an upper cylinder head and a lower cylinder head. The intermediate plate is encapsulated between the two cylinders, and the two cylinders are encapsulated between the upper cylinder head and the lower cylinder head. The two pistons are arranged in a one-to-one correspondence with the two cylinders, and the pistons are fitted onto the crankshaft and rolled inside the cylinders.

[0014] As a preferred technical solution for the air replenishment structure of the above-mentioned rotary compressor, the air replenishment port includes an inlet section and an outlet section that are interconnected. The inlet section is used to communicate with the air replenishment system, and the outlet of the outlet section faces the compression chamber of the cylinder.

[0015] As a preferred technical solution for the air supply structure of the above-mentioned rotary compressor, there are multiple air supply holes, and the multiple air supply holes are respectively opened on two or three of the intermediate plate, the upper cylinder head and the lower cylinder head.

[0016] As a preferred technical solution for the air supply structure of the above-mentioned rotary compressor, when the air supply hole is opened on the intermediate plate, the outlet of the air outlet section is located on the end face of the intermediate plate facing the cylinder.

[0017] As a preferred technical solution for the air supply structure of the above-mentioned rotary compressor, when the air supply hole is opened on the upper cylinder head or the lower cylinder head, the outlet of the air outlet section is located on the end face of the upper cylinder head or the lower cylinder head facing the cylinder.

[0018] As a preferred technical solution for the gas replenishment structure of the above-mentioned rotary compressor, a gas replenishment channel is provided on the intermediate plate, the upper cylinder head or the lower cylinder head where the gas replenishment hole is located, and the gas replenishment channel connects the intake section and the gas replenishment system.

[0019] As a preferred technical solution for the air supply structure of the above-mentioned rotary compressor, the intermediate plate is composed of an upper intermediate plate and a lower intermediate plate spliced ​​together, one of the cylinders is disposed between the upper intermediate plate and the upper cylinder head, and the other cylinder is disposed between the lower intermediate plate and the lower cylinder head.

[0020] As a preferred technical solution for the gas supply structure of the above-mentioned rotary compressor, the rotary compressor further includes a housing, and the pump body section is housed within the housing.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention provides a gas injection structure for a rotary compressor. The rotary compressor includes a pump body section, which comprises several cylinders, several intermediate plates, several pistons, a crankshaft, an upper cylinder head, and a lower cylinder head. The cylinders are encapsulated between the upper and lower cylinder heads, and the intermediate plates are encapsulated between adjacent cylinders. The pistons are arranged in a one-to-one correspondence with the cylinders, and are fitted onto the crankshaft and rolled within the cylinders. Each cylinder has a vane groove. The gas injection structure includes a gas injection port, which is located on at least one of the intermediate plates, the upper cylinder head, and the lower cylinder head. The center distance between the gas injection port and its corresponding intermediate plate, upper cylinder head, or lower cylinder head is L. The inner diameter of the piston is R. i , where L and R i satisfy:

[0023] ;

[0024] The inner diameter of the cylinder is R. d The cylinder height is D, the piston outer diameter is R0, the crankshaft eccentricity is e, and the air intake angle is β. When the cylinder displacement is between 9cc and 19cc, and the piston's rotation angle relative to the vane groove centerline is 0°, L and R... d D, R i R0, e, and β satisfy:

[0025] ;

[0026] When the displacement of cylinder 1 is between 19cc and 27cc, and the rotation angle of piston 2 relative to the center line of vane groove 3 is 0°, L and R... d D, R i R0, e, and β satisfy:

[0027] .

[0028] This configuration, by precisely controlling the angle parameters of the air injection port and the center distance between the air injection port and air injection components such as the intermediate plate, upper cylinder head, or lower cylinder head, effectively adjusts the air injection angle, air injection start angle, and air injection close angle. This high-precision control method can significantly improve the working efficiency and performance indicators of the air injection machine, enabling it to more accurately meet the needs of actual operating conditions, reduce equipment wear and failure rate caused by untimely or excessive air injection, achieve energy saving and cost optimization, and thus effectively enhance the overall performance and operating efficiency of the entire air injection system. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the gas supply structure of the rotary compressor provided by the present invention.

[0030] in:

[0031] 1. Cylinder; 2. Piston; 3. Vane groove; 4. Air inlet. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0034] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1 As shown, this embodiment provides a gas injection structure for a rotary compressor. The rotary compressor includes a pump body section, which includes several cylinders 1, several intermediate plates, several pistons 2, a crankshaft, an upper cylinder head, and a lower cylinder head. The cylinders 1 are encapsulated between the upper and lower cylinder heads, and the intermediate plates are encapsulated between two adjacent cylinders 1. The pistons 2 are arranged in a one-to-one correspondence with the cylinders 1, and the pistons 2 are fitted onto the crankshaft and rolled within the cylinders 1. Each cylinder 1 has a vane groove 3. The gas injection structure includes a gas injection hole 4, which is located on at least one of the intermediate plates, the upper cylinder head, and the lower cylinder head. The center distance between the gas injection hole 4 and its corresponding intermediate plate, upper cylinder head, or lower cylinder head is L. The inner diameter of the piston 2 is R. i , where L and R i satisfy:

[0038] ;

[0039] The inner diameter of cylinder 1 is R. d The height of cylinder 1 is D, the outer diameter of piston 2 is R0, the eccentricity of the crankshaft is e, and the angle of the air intake port 4 is β. When the displacement of cylinder 1 is between 9cc and 19cc, and the rotation angle of piston 2 relative to the centerline of vane groove 3 is 0°, L and R... d D, R i R0, e, and β satisfy:

[0040] .

[0041] This configuration, by precisely controlling the angle parameters of the air injection port 4 and the center distance between the air injection port 4 and other air injection components such as the intermediate plate, upper cylinder head, or lower cylinder head, effectively adjusts the air injection angle, air injection start angle, and air injection close angle. This high-precision control method can significantly improve the working efficiency and performance indicators of the air injection machine, enabling it to more accurately meet the needs of actual operating conditions, reduce equipment wear and failure rates caused by untimely or excessive air injection, achieve energy saving and cost optimization, and thus effectively enhance the overall performance and operating efficiency of the entire air injection system.

[0042] Optionally, when the displacement of cylinder 1 is in the range of 19cc-27cc, and the rotation angle of piston 2 with respect to the center line of vane groove 3 is 0°, L, R d D, R i R0, e, and β satisfy:

[0043] .

[0044] It is important to note that compressors of different displacements have specific requirements for the location and layout of the air injection port 4. Therefore, during the design phase, it is essential to perform targeted optimization based on the specific displacement parameters of the compressor to ensure optimal matching and operational reliability of the air injection system. Specifically, L and R... d D, R i The units for R0 and e are both millimeters.

[0045] Specifically, this embodiment provides the following technical solution: the pump body section includes two cylinders 1, an intermediate plate, two pistons 2, a crankshaft, an upper cylinder head and a lower cylinder head. The intermediate plate is encapsulated between the two cylinders 1, and the two cylinders 1 are encapsulated between the upper cylinder head and the lower cylinder head. The two pistons 2 are arranged in a one-to-one correspondence with the two cylinders 1, and the pistons 2 are fitted onto the crankshaft and rolled inside the cylinders 1.

[0046] Optionally, in order to ensure that the air supply path is clear and the injection position is controllable, so as to further facilitate the efficient mixing of the air supply gas and the working fluid in the compression chamber of cylinder 1, the air supply port 4 includes an inlet section and an outlet section that are interconnected. The inlet section is used to communicate with the air supply system, and the outlet of the outlet section faces the compression chamber of cylinder 1. The angle of the air supply port 4 is the tilt angle of the outlet of the outlet section.

[0047] In this embodiment, there are multiple air injection holes 4, which are respectively opened on two or three of the intermediate plate, the upper cylinder head, and the lower cylinder head. This arrangement can provide multiple air injection points for different cylinders 1 of the dual-cylinder compressor or different compression stages of the same cylinder 1, so as to achieve more flexible and precise air injection control, which helps to further optimize the compression process and improve the uniformity of the overall machine performance and the peak efficiency.

[0048] Optionally, to ensure that the outlet of the exhaust section is directly connected to the compression chamber, allowing the replenishing gas to enter the compression process most directly and quickly, reducing flow losses and pressure pulsations, when the replenishing port 4 is located on the intermediate plate, the outlet of the exhaust section is located on the end face of the intermediate plate facing the cylinder 1. Further, when the replenishing port 4 is located on the upper or lower cylinder head, the outlet of the exhaust section is located on the end face of the upper or lower cylinder head facing the cylinder 1.

[0049] Optionally, an air injection channel is provided on the intermediate plate, upper cylinder head, or lower cylinder head where the air injection port 4 is located, and the air injection channel connects the intake section and the air injection system.

[0050] In this embodiment, in order to strengthen the overall structural strength of the intermediate plate and ensure the stability of the air replenishment process, the intermediate plate is composed of an upper intermediate plate and a lower intermediate plate spliced ​​together. One cylinder 1 is located between the upper intermediate plate and the upper cylinder head, and the other cylinder 1 is located between the lower intermediate plate and the lower cylinder head.

[0051] Alternatively, the rotary compressor may also include a housing, within which the pump section is housed.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A gas supply structure for a rotary compressor, the rotary compressor comprising a pump body section, the pump body section comprising a plurality of cylinders (1), a plurality of intermediate plates, a plurality of pistons (2), a crankshaft, an upper cylinder head and a lower cylinder head, the plurality of cylinders (1) being encapsulated between the upper cylinder head and the lower cylinder head, the intermediate plates being encapsulated between two adjacent cylinders (1), the plurality of pistons (2) being arranged in a one-to-one correspondence with the plurality of cylinders (1), and the pistons (2) being fitted onto the crankshaft and rollingly disposed within the cylinders (1), the cylinders (1) being provided with blade grooves (3), characterized in that, The air injection structure includes an air injection hole (4), which is located on at least one of the intermediate plate, the upper cylinder head, and the lower cylinder head. The center distance between the air injection hole (4) and the intermediate plate, the upper cylinder head, or the lower cylinder head is L, and the inner diameter of the piston (2) is R. i , where L and R i satisfy: ； The inner diameter of the cylinder (1) is R. d The height of the cylinder (1) is D, the outer diameter of the piston (2) is R0, the eccentricity of the crankshaft is e, and the angle of the air inlet (4) is β. When the displacement of the cylinder (1) is between 9cc and 19cc, and the rotation angle of the piston (2) relative to the centerline of the blade groove (3) is 0°, L and R... d D, R i R0, e, and β satisfy: 。 2. The gas supply structure of the rotary compressor according to claim 1, characterized in that, When the displacement of the cylinder (1) is between 19cc and 27cc, and the rotation angle of the piston (2) with respect to the center line of the vane groove (3) is 0°, L and R d D, R i R0, e, and β satisfy: 。 3. The gas supply structure of the rotary compressor according to claim 1, characterized in that, The pump body section includes two cylinders (1), an intermediate plate, two pistons (2), a crankshaft, an upper cylinder head and a lower cylinder head. The intermediate plate is encapsulated between the two cylinders (1), and the two cylinders (1) are encapsulated between the upper cylinder head and the lower cylinder head. The two pistons (2) are arranged in a one-to-one correspondence with the two cylinders (1), and the pistons (2) are fitted onto the crankshaft and rolled inside the cylinders (1).

4. The gas supply structure of the rotary compressor according to claim 3, characterized in that, The air inlet (4) includes an air inlet section and an air outlet section that are interconnected. The air inlet section is used to communicate with the air supply system, and the outlet of the air outlet section faces the compression chamber of the cylinder (1).

5. The gas supply structure of the rotary compressor according to claim 4, characterized in that, The number of air inlet holes (4) is multiple, and the multiple air inlet holes (4) are respectively opened on two or three of the intermediate plate, the upper cylinder head and the lower cylinder head.

6. The gas supply structure of the rotary compressor according to claim 5, characterized in that, When the air inlet (4) is opened on the intermediate plate, the outlet of the air outlet section is located on the end face of the intermediate plate facing the cylinder (1).

7. The gas supply structure of the rotary compressor according to claim 6, characterized in that, When the air inlet (4) is located on the upper cylinder head or the lower cylinder head, the outlet of the air outlet section is located on the end face of the upper cylinder head or the lower cylinder head facing the cylinder (1).

8. The gas supply structure of the rotary compressor according to claim 4, characterized in that, The intermediate plate, the upper cylinder head or the lower cylinder head where the air injection hole (4) is located has an air injection channel, and the air injection channel connects the air intake section and the air injection system.

9. The gas supply structure of the rotary compressor according to claim 3, characterized in that, The intermediate plate is composed of an upper intermediate plate and a lower intermediate plate spliced ​​together. One of the cylinders (1) is disposed between the upper intermediate plate and the upper cylinder head, and the other cylinder (1) is disposed between the lower intermediate plate and the lower cylinder head.

10. The gas supply structure of the rotary compressor according to any one of claims 1-9, characterized in that, The rotary compressor also includes a housing, and the pump section is housed within the housing.

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